ENvironmentSet

Waitor

특정 시점까지 특정 객체에 대한 연산을 미루는 래퍼 객체

// Without Waitor
document.addEventListener('DOMContentLoaded', () => {
  console.log(document.getElementById('a').value);
});

ENvironmentSet

function problem1(a, b, c) {
  arguments[0] = 100;
  return [a, b, c];
}

problem1(1, 2, 3) // 반환값을 맞추어 보세요!

정답: [100, 2, 3]

ENvironmentSet

Andrea Simone Costa의 글을 보고 작성한 글 입니다(Andrea의 설명은 읽지 않고 쓰는 글이라 원문과 다르게 설명했을 확률이 높습니다).

요약

spread properties의 문법적, 의미적인 성질을 이용하면 다음과 같이 깔끔하게 조건부로 객체의 프로퍼티를 선언할 수 있습니다.

const condition = true;
const foo = {

ENvironmentSet

/**
data List a = Nil | Cons a (List a)

class Monoid a where
  mempty :: a
  mappend :: a -> a -> a

instance Monoid (List a) where
  mempty = Nil
  mappend Nil ys = ys

ENvironmentSet

// Sorry for poor naming, this example was intented to explain how to use skolem capturing in practise.

interface Stateful<S, A> {
  (state: S): [A, S] 
}

function fmap<S, A, B>(f: (a: A) => B): (stateful: Stateful<S, A>) => Stateful<S, B> {
  return stateful => state => {
    const [a, nextState] = stateful(state);

ENvironmentSet

type Any = <B>(f: <A>(a: A) => B) => B; // Instead of forall a. a, use it's continuation. (they're isomorphic)

function any<A>(a: A): Any { 
  return f => f(a);
}

ENvironmentSet

export interface HKT {
  param: unknown;
  result: unknown;
}

interface NotHKT extends HKT {
  result: this['param'] extends true ? false : true;
}

interface FstHKT extends HKT {

ENvironmentSet

/** If you want to know how to encoding HKTs in typescript, check this: 
    https://gist.github.com/ENvironmentSet/1662a140f99381bc85fd6be51ecdcbb5
    
    Sorry for messy names, this was only PoC.                            **/

export interface HKT {
  param: unknown;
  result: unknown;
}

ENvironmentSet

# First, you must get the previous commit sha, the one before the forced push:

## Hit through terminal
curl -u <username> https://api.github.com/repos/:owner/:repo/events

# Then you can create a branch from this sha:

## Hit through terminal
curl -u <github-username> -X POST -d '{"ref":"refs/heads/<new-branch-name>", "sha":"<sha-from-step-1>"}' https://api.github.com/repos/:owner/:repo/git/refs

ENvironmentSet

{-# START_FILE package.yaml #-}
spec-version:                       0.31.0
name:                               {{name}}
version:                            0.1.0.0
# synopsis:
# description:
category:                           {{category}}{{^category}}Web{{/category}}
homepage:                           https://github.com/{{github-username}}{{^github-username}}githubuser{{/github-username}}/{{name}}#readme
bug-reports:                        https://github.com/{{github-username}}{{^github-username}}githubuser{{/github-username}}/{{name}}/issues
author:                             {{author-name}}{{^author-name}}Author name here{{/author-name}}